Autor segons l'article: Isarn, Isaac; Bonnaud, Leila; Massagues, Lluis; Serra, Angels; Ferrando, Francesc
Departament: Enginyeria Mecànica Química Analítica i Química Orgànica Enginyeria Electrònica, Elèctrica i Automàtica
Autor/s de la URV: Ferrando Piera, Francesc / Isarn Garcia, Isaac / Massagués Vidal, Lluís / Serra Albet, Maria Angels
Paraules clau: Thermal conductivity Stability Platelets Permeability Nanocomposites Mechanical-properties Graphene Functionalization Epoxy resins Composites Coatings Carbon nanotubes Boron nitride Behavior Adhesive strength
Resum: The enhancement of the thermal conductivity, keeping the electrical insulation, of epoxy thermosets through the addition of pristine and oxidized carbon nanotubes (CNTs) and microplatelets of boron nitride (BN) was studied. Two different epoxy resins were selected: a cycloaliphatic (ECC) epoxy resin and a glycidylic (DGEBA) epoxy resin. The characteristics of the composites prepared were evaluated and compared in terms of thermal, thermomechanical, rheological and electrical properties. Two different dispersion methods were used in the addition of pristine and oxidized CNTs depending on the type of epoxy resin used. Slight changes in the kinetics of the curing reaction were observed in the presence of the fillers. The addition of pristine CNTs led to a greater enhancement of the mechanical properties of the ECC composite whereas the oxidized CNTs presented a greater effect in the DGEBA matrix. The addition of CNTs alone led to a marked decrease of the electrical resistivity of the composites. Nevertheless, in the presence of BN, which is an electrically insulating material, it was possible to increase the proportion of pristine CNTs to 0.25 wt% in the formulation without deterioration of the electrical resistivity. A small but significant synergic effect was determined when both fillers were added together. Improvements of about 750% and 400% in thermal conductivity were obtained in comparison to the neat epoxy matrix for the ECC and DGEBA composites, respectively. (c) 2019 Society of Chemical Industry
Àrees temàtiques: Química Polymers and plastics Polymer science Organic chemistry Materials chemistry Materiais Interdisciplinar Farmacia Engenharias iv Engenharias iii Engenharias ii Engenharias i Ciências biológicas ii Ciências biológicas i Ciência de alimentos Biotecnología Biodiversidade Astronomia / física
Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
ISSN: 0959-8103
Adreça de correu electrònic de l'autor: angels.serra@urv.cat f.ferrando@urv.cat lluis.massagues@urv.cat
Identificador de l'autor: 0000-0003-1387-0358 0000-0003-4450-2734 0000-0002-4197-5600
Pàgina final: 290
Data d'alta del registre: 2024-11-02
Volum de revista: 69
Versió de l'article dipositat: info:eu-repo/semantics/acceptedVersion
URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
Referència a l'article segons font original: Polymer International. 69 (3): 280-290
Referència de l'ítem segons les normes APA: Isarn, Isaac; Bonnaud, Leila; Massagues, Lluis; Serra, Angels; Ferrando, Francesc (2020). Study of the synergistic effect of boron nitride and carbon nanotubes in the improvement of thermal conductivity of epoxy composites. Polymer International, 69(3), 280-290. DOI: 10.1002/pi.5949
Entitat: Universitat Rovira i Virgili
Any de publicació de la revista: 2020
Pàgina inicial: 280
Tipus de publicació: Journal Publications
Repositori URV